Adds GROUP_ANALYTICS_MODE to not null fields, a=chris

diff --git a/src/controllers/components/SystemComponent.php b/src/controllers/components/SystemComponent.php
index fa8b7f1d6..d3b74fb53 100755
--- a/src/controllers/components/SystemComponent.php
+++ b/src/controllers/components/SystemComponent.php
@@ -845,7 +845,8 @@ EOD;
             'TIMEZONE' => 'America/Los_Angeles',
             'SESSION_NAME' => "yioopbiscuit",
             'CSRF_TOKEN' => "YIOOP_TOKEN",
-            'DIFFERENTIAL_PRIVACY' => false
+            'DIFFERENTIAL_PRIVACY' => false,
+            'GROUP_ANALYTICS_MODE' => false
         ];
         $data = [];
         $data['AUTOLOGOUT_TIMES'] = [